feat(ndt_scan_matcher): add grid_search initial pose estimation

[SakodaShintaro]

Description

See https://github.com/autowarefoundation/autoware.universe/pull/6790

Tests performed

See https://github.com/autowarefoundation/autoware.universe/pull/6790

Effects on system behavior

See https://github.com/autowarefoundation/autoware.universe/pull/6790

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